2012 年高三一轮复习金子般的学案语法部分：名词性从句（新人教版）【定义】一个句子在另一个句子中充当主语、宾语、表语、同位语，相当于名词，故称为名词性从句。【四大从句】名词性从句分为主语从句、宾语从句、表语从句和同位语从句。一、主语从句一个句子在另一个句子中充当主语，即句子充当主语，该句子称为主语从句。【完成例句】 根据句意选词填空(that, if, whether, why, when, what) (1) That he will succeed is certain. (2) Whether he will go there is not known. (3) What he said is not true. (4) When the meeting will be held has not been decided yet. 【结论】 ① that－从句，从句为一个句意完整的陈述句，没有具体意义，不充当句子成分，只起标志性作用，但 that 不能省略。 ②whether －从句，从句来源于一般疑问句，whether 不能省略，意为“是否”，不能用if 替换。 ③ 特殊疑问词－从句，从句来源于特殊疑问句，特殊疑问词不能省略，意思为特殊疑问词本来的意思，在从句中充当句子成分。【疑难 1】Who he is is none of my business. 【疑难剖析 1】任何从句要用陈述句语序，即主谓语序。【疑难 2】That he likes English is known to us all. What he said at the meeting made me sad. 【疑难剖析 2】主句时态为过去时，从句时态为过去的某一时态；主句时态为现在时或将来时，从句时态视具体情况而定。【疑难 3】That 2010 Asian Games are successful is known to all. 【疑难剖析 3】单个句子作主语，视为单数。【疑难 3】It is a pity that you didn't go to see the film. It doesn't interest me whether you succeed or not. It is in the morning that the murder took place. 用心 爱心 专心1 It is John that broke the window. 【疑难剖析 3】1．主语从句通常由 it 充当形式主语，而本身放在句子末尾。2．it 作形式主语和 it 引导强调句的比较 it 作形式主语代替主语从句，主要是为了平衡句子结构，主语从句的连接词没有变化。而 it 引导的强调句则是对句子某一部分进行强调，无论强调的是什么成分，都可用连词that。被强调部分指人时也可用 who / whom。 3. 用 it 作形式主语的常用结构[ ] ① It is ＋ 名词 ＋ 从句 It is ...
